Ball-worm transmission
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United States of America Patent
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-
May 30, 2006
Grant Date -
Jun 26, 2003
app pub date -
Oct 16, 2002
filing date -
Nov 13, 2001
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A ball-worm transmission is provided which replaces the sliding friction of the classic worm mechanism with the rolling friction of spherical balls. The ball-worm transmission assembly includes a worm which defines a recirculation path, and a gear coupled to the worm via a plurality of spherical balls. The gear includes a plurality of teeth each having a thickness in a central plane of the gear and a lesser thickness towards both sides of the gear, so that a gap is defined between the teeth is larger towards both sides of the gear than in the central plane of the gear.
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